xbmc/cores/VideoPlayer/DVDResource.h

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #pragma once
  10
  11 #include <assert.h>
  12 #include <atomic>
  13
  14 template<typename T> struct IDVDResourceCounted
  15 {
  16   IDVDResourceCounted() : m_refs(1) {}
  17   virtual ~IDVDResourceCounted() = default;
  18
  19   IDVDResourceCounted(const IDVDResourceCounted &) = delete;
  20   IDVDResourceCounted &operator=(const IDVDResourceCounted &) = delete;
  21
  22   virtual T*  Acquire()
  23   {
  24     ++m_refs;
  25     return static_cast<T*>(this);
  26   }
  27
  28   virtual long Release()
  29   {
  30     long count = --m_refs;
  31     assert(count >= 0);
  32     if (count == 0)
  33       delete static_cast<T*>(this);
  34     return count;
  35   }
  36   std::atomic<long> m_refs;
  37 };